TM 1–1520–238–T–320–2220–54 SIGNAL NAME:DOP DISTANCE TO GOMEMORY LOCATION: 000504MEMORY DATA BIT(S):15–12(HEX)CONDITION:If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 0=0If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 0=1If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 1=2If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 1=3If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 2=4If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 2=5If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 3=6If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 3=7If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 4=8If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 4=9SIGNAL FUNCTION:Indicates hundredths field.REMARKS: From Doppler through CPG MRTU Type III to FCC.PASS:Location of fault if CONDITION agrees with distance to go: CPG MRTU Type III, wiring fromCPG MRTU Type III to Doppler, and Doppler. Troubleshoot wiring to isolate fault(TM 9–1230–476–20–1).FAIL: Location of fault: Doppler, wiring from Doppler to CPG MRTU Type III, CPG MRTU Type III.Troubleshoot wiring to isolate fault (TM 11–1520–238–23–2).20–55 SIGNAL NAME:DOP SINE TRUE HEADINGMEMORY LOCATION: 000505MEMORY DATA BIT(S):18–17(BINARY)CONDITION:If fifth digit displayed on HOD is 2 or 3=failure warningIf fifth digit displayed on HOD is 4 or 5=no computed data and no failure detectedIf fifth digit displayed on HOD is 6 or 7=minus, south, east, down, and fromSIGNAL FUNCTION:Indicates sine/status of Doppler.REMARKS: From Doppler through CPG MRTU Type III to FCC.PASS:If CONDITION agrees with heading, go to paragraph 20–56.FAIL: Location of fault: Doppler, wiring from Doppler to CPG MRTU Type III, CPG MRTU Type III.Troubleshoot wiring to isolate fault (TM 11–1520–238–23–2).20–56 SIGNAL NAME:DOP SINE TRUE HEADINGMEMORY LOCATION: 000505 AND 000506MEMORY DATA BIT(S):16–4 AND 19–18(SCALAR)CONDITION:Monitor HOD; memory location response should indicate a positive from 0 to180 degrees or a negative from 181 to 359 degrees.SIGNAL FUNCTION:Indicates Doppler sine true heading.REMARKS: From Doppler through CPG MRTU Type III to FCC.PASS:If CONDITION agrees with heading, go to paragraph 20–57.FAIL: Location of fault: Doppler, wiring from Doppler to CPG MRTU Type III, CPG MRTU Type III.Troubleshoot wiring to isolate fault (TM 11–1520–238–23–2).